Restart not possible for liquidFilmFoam

Summary

Impossible to restart a simulation with liquidFilmFoam

Steps to reproduce

Run the tutorial $FOAM_TUTORIALS/finiteArea/liquidFilmFoam/cylinder
Restart the simulation from latestTime

Example case

What is the current bug behaviour?

At restart the solver looks for the areaScalarField h (as it is given in the 0 folder), but in the saved time folders it is written out as a volScalarField (with object name H).
Two different fields, h (area) and H (vol), are created, but possibly the write() function is not case sensitive and the volScalarField overwrites the areaScalarField.

What is the expected correct behavior?

Relevant logs and/or images

--> FOAM FATAL IO ERROR:
unexpected class name volScalarField expected areaScalarField
    while reading object h

file: /liquidFilmFoam/cylinder/0.5/h at line 15.

    From function Foam::Istream& Foam::regIOobject::readStream(const Foam::word&, bool)
    in file db/regIOobject/regIOobjectRead.C at line 170.

FOAM exiting

Environment information

OpenFOAM version : v1912
Operating system :
Hardware info :
Compiler :